WHY DID RADIO STOP OPERATING? on 2008 Mercedes-Benz S550 4MATIC

RADIO DOES NOT WORK. NO SOUND, NO STATIONS. MESSAGE ON SCREEN: DEVICE NOT AVAILABLE. NO SOUND ON GPS.

1 answer
I remember seeing a service bulletin for Audio/Command wiring harness going bad on these. Maybe covered under warranty. check with your local mercedes benz specialist or
dealer.